Update monet.

build/secondary/testing/gmock/BUILD.gn

Index: build/secondary/testing/gmock/BUILD.gn
diff --git a/build/secondary/testing/gmock/BUILD.gn b/build/secondary/testing/gmock/BUILD.gn
index 4ec62245e6b2ddaa11a0ac41de839f109d410021..a243b338bd130d9281e1a82df92bd9a6bb4bbf0a 100644
--- a/build/secondary/testing/gmock/BUILD.gn
+++ b/build/secondary/testing/gmock/BUILD.gn
@@ -5,6 +5,13 @@
 config("gmock_config") {
   # Gmock headers need to be able to find themselves.
   include_dirs = [ "include" ]
+
+  if (is_clang) {
+    # The |MOCK_METHODn()| macros do not specify "override", which triggers this
+    # warning: "error: 'Method' overrides a member function but is not marked
+    # 'override'".
+    cflags = [ "-Wno-inconsistent-missing-override" ]
+  }
 }
 
 static_library("gmock") {